q4.go

package main

import (
  "fmt"
  "io"
  "crypto/md5"
  "strings"
)

func md5sum(text string) string {
  h := md5.New()
  io.WriteString(h, text)
  return fmt.Sprintf("%x", h.Sum(nil))
}

func createResponse(a string, method string, url string, nonce string, nc string, cnonce string, qop string) string {
  return md5sum(strings.Join([]string{a, nonce, nc, cnonce, qop, md5sum(strings.Join([]string{method, url}, ":"))}, ":"))
}